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Finding the Fourth Proportional to 326,259.78, 489,308.67 and 89,590.74

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Solution

The fourth proportional to 326,259.78, 489,308.67 and 89,590.74 is: 134,363.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,259.78 : 489,308.67 = 89,590.74 : x
  2. Step 2: Convert to fraction form
    326,259.78/489,308.67 = 89,590.74/x
  3. Step 3: Cross multiply
    326,259.78x = 489,308.67 × 89,590.74
  4. Step 4: Simplify right side
    326,259.78x = 43,837,525,833.72
  5. Step 5: Solve for x
    x = 43,837,525,833.72/326,259.78
  6. Step 6: Final answer
    x = 134,363.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.